Abstract
Received signal strength RSS in wireless networks is widely adopted for indoor positioning purpose because of its low cost and open access properties. However, the popular RSSs are observed to differ significantly from discrete devices' hardware even under the same wireless conditions. Signal strength difference-based approach is an efficient strategy to overcome the drawbacks of RSSs. In this paper, we present a robust location fingerprint based on SSD. Firstly, a beacon selection algorithm is proposed to choose the beacons that have the best distinguishing results and stability as reference beacons. Secondly, a robust location fingerprint based on differential signal strength and dynamic linear interpolation is suggested to reduce the high labor cost in offline phase. The evaluation results show that the proposed approaches can achieve higher accuracy and robustness. Copyright © 2016 John Wiley & Sons, Ltd.
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